"Unbearable loss" refers to an extremely painful experience of losing someone or something important, which feels too difficult or overwhelming to endure.
Sentences with «unbearable loss»
Each man draws Fenno into territories of the heart he has never braved before, leading him toward an almost unbearable loss that will reveal to him the nature of love. (bookbrowse.com)
And though the idea is mostly out of our conscious awareness, in becoming parents we make ourselves vulnerable to an unlikely but real possibility of unbearable loss. (psychologytoday.com)